Ubuntu 24.04 LTS build instructions

[kakra]

Some people may be interested to use backported patches in Ubuntu 24.04 LTS.

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Notes:

• https://wiki.debian.org/BuildingTutorial

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So here's my first progress in an Ubuntu Noble container:

Modify /etc/apt/sources.list.d/ubuntu.sources to use Types: deb deb-src.

Then install the kernel build deps:

sudo apt update
sudo apt install build-essential fakeroot devscripts
sudo apt build-dep linux linux-image-generic

We cannot build a signed kernel here. So let's install the unsigned kernel sources (as user):

mkdir kernel && cd kernel
apt source linux-image-unsigned-$(uname -r)

Next, try to build the packages without modifications:

cd linux-6.8.0
fakeroot debian/rules -j$(nproc) binary

This will take a while: The build script will now build multiple packages, module packs and flavors. In the end, you should receive a deb package like this:

# ls ../linux-image-*.deb
../linux-image-unsigned-6.8.0-60-generic_6.8.0-60.63_amd64.deb

Next, I'll try applying the patches to create a derived kernel package.

[KeinNiemand]

I think some additional dependencies for the build proccess may be required at least that what this ubuntu wiki page says (it's refering to a diffrent version of ubuntu so not sure if it aplays to 24.04)

[kakra]

Yep, I tried a different approach first and may have installed some dependencies already. I'll retry from a fresh container after I got it working. For now, it completed a full kernel build. Some deps are only needed if you run make menuconfig, others are pulled in by apt build-dep.

I think I had to manually install flex and bison which were not installed by apt build-deps.

[KeinNiemand]

Let me know once you figure out how to build the kernel and apply your patch, I already tried it myself (downloading the ubuntu kernel source via git instead of apt source) and there appear to be at least some merge conflicts. I haven't tried to actually build the kernel just tried to see if the patches apply cleanly as is and it looks like they don't.

[kakra]

Of course we could so that: Simply unpack sources, patch, build, install. But then, your package manager doesn't know about these files. My proposal will create a deb package you can actually install, and which automatically properly hooks up in all the other functions that Ubuntu deploys: boot menu, DKMS, file conflicts...

[KeinNiemand]

Any updates on this, I'd still like to test those patches (assuming they aren't going to be in a mainline kernel anytime soon/whenever I upgrade to the next ubuntu LTS version)